Linux shell scripts random related applications and batch modification build exercises

I. Three ways to take random numbers and encrypt them

1.random of Fetch and encryption

The method of taking the number:

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To take the random number method:

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To take a random number and encrypt the method:

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To intercept a different number of bits after encryption:

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2.data time take random number and Encrypt

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3.openssl take random numbers and encrypt

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Two. Application of random numbers

1. Batch Create a file that starts with a random number

Topic 1: Create a 10-beginning random number with 10 lowercase letters in the/westos directory, ending with a _westos.html file

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Topic 2: Converting HTML into HTML in bulk

The first method for

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The second method AWK

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Topic 3: Create 10 random numbers starting with 10 lowercase letters in the/westos directory, ending with _westos followed by a two-bit ordinal. html file

Note: The following script uses two methods for generating random encryption numbers: random and OpenSSL

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2. Batch create the user with serial number, and the password is random number, and output to the file

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Operation Result:

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To view the output file:

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To delete a user created in bulk:

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3. Convert the encrypted key to a number before encryption (crack encryption)

Defines an array of encrypted text that needs to be cracked

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FUNGETMD5 to generate all random encryption, a total of 32,767

FUNFINDMD5 is compared with the encryption in the array.

Adjust the cut's number of digits if not

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Linux shell scripts random related applications and batch modification build exercises